Introduction: Annual effective radiation dose from all natural sources is approximately about 2.4 mSv and contribution of unnatural or man-made sources is 0.8 mSv. In some places of Ramsar, radiation dose due to radon exposure is about 3700 Bqm -3 while according to US EPA instruction radon levels should be 200 Bq m-3. Amazingly, there is not a meaningful result in the studies...

The city of Ramsar Iran hosts some of the highest natural radiation levels on earth, and over 2000 people are exposed to radiation doses ranging from 1 to 26 rem per year. Curiously, inhabitants of this region seem to have no greater incidence of cancer than those in neighboring areas of normal background radiation levels, and preliminary studies suggest their blood cells experience fewer induc...

Cancer causing potential of chronic exposure to high natural radiation seen in Chavara– Neendakara coast of Karunagappally taluk in Kerala, India is studied by the Natural Background Radiation Cancer Registry, Karunagappally since 1990. Population survey of 359,619 people recorded socio-demographic (SD) information and radiation levels measured inside (71,674) and outside (76,942) houses. Radia...

The major objective of this study is to examine cancer mortality risk associated with lowlevel radiation exposure occurring in the high background radiation area (HBRA) in Yangjiang of Guangdong Province, China. The average annual effective doses received by the inhabitants from natural sources of external and internal exposures in HBRA are estimated to be 2.10 and 4.27 mSv, respectively, and t...

background: radon is the second leading cause of lung cancer after smoking. in canada, the health authorities have no access to comprehensive profile of the communities built over uranium-rich micro-geological settings. the present indoor radon monitoring guideline is unable to provide an accurate identification of health hazards due to discounting several parameters of housing characteristics....

High background radiation area/Mutation-based diseases/Cancer mortality/Down's syndrome Data from the epidemiological investigation on mutation-based diseases in the High Background Radia tion Area (HBRA) of Yangjiang, China, were analyzed. Although the gamma exposure level in the HBRA is three times that of the Control Area (CA) and about ninety percent of the families in the HBRA have lived t...

background: ionizing radiation is present in all environment of the earth’s surface, beneath the earth and in the atmosphere. human beings are exposed to external radiation from their surroundings naturally and also to internal radiation from food, water and air they consume. then, it is important to measure and develop knowledge about radiation. objective: this study is designed to evaluate th...

The present work deals with the radioactivity of samples of tin tailings collected from a mining site in Jos, Nigeria. The activity concentrations of the samples were measured using a gamma-ray spectrometer with a hyper-pure germanium detector. In situ dose rates at the site were also measured using a precalibrated survey meter. Potassium-40 was not detected in any of the studied samples. The a...